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Finding the Fourth Proportional to 8,959.78, 13,445.07 and 3,120.49

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Solution

The fourth proportional to 8,959.78, 13,445.07 and 3,120.49 is: 4,682.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.78 : 13,445.07 = 3,120.49 : x
  2. Step 2: Convert to fraction form
    8,959.78/13,445.07 = 3,120.49/x
  3. Step 3: Cross multiply
    8,959.78x = 13,445.07 × 3,120.49
  4. Step 4: Simplify right side
    8,959.78x = 41,955,206.48
  5. Step 5: Solve for x
    x = 41,955,206.48/8,959.78
  6. Step 6: Final answer
    x = 4,682.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.